scispace - formally typeset
Search or ask a question

Answers from top 20 papers

More filters
Papers (20)Insight
The proposed method extends the matrix-form of the conventional control mixer concept into a linear time invariant dynamic form.
The linear input region is inversely proportional to gain, making the amplifier very well suited for automatic gain control circuits.
mixer may exhibit a conversion gain approaching that of the corresponding amplifier.
This is the first demonstration of a monolithic HEMT mixer with conversion gain at W-band.
Proceedings ArticleDOI
Prabir Saha, John D. Cressler 
13 Dec 2010
Control voltages and currents allow the mixer performance to be “healed”, nullifying effects of process variation or environmental changes.
This oscillator mixer requires a lower supply voltage and achieves a higher operating frequency among recently reported Si-based self-oscillating mixers and mixer oscillators.
Open accessProceedings ArticleDOI
Matthew A. Morgan, Sander Weinreb 
20 May 2001
This is the first demonstration of a monolithic HEMT diode balanced mixer in this frequency range.
Further, as the VCO directly drives the mixer, the input capacitance of the mixer can be incorporated into the degeneration capacitor of the negative resistance cell.
Open accessJournal ArticleDOI
Fridolin Okkels, Patrick Tabeling 
63 Citations
Because of the resonances, a slight tuning of the control parameters makes the mixer enhance the mixing, or suppress it, enhancing interfacial diffusion instead.
Apart from the low voltage operation, the current folded-mirror mixer has a similar performance in gain, linearity, and frequency performance compared with a traditional high voltage mixer.
Test measurement results confirm that the mixer achieves independent and linear conversion gain control in dual-band simultaneous receiving.
Moreover, the added circuit increases the conversion gain of the mixer.
Open accessProceedings ArticleDOI
Zhenyu Yang, Mogens Blanke 
28 Jun 2000
37 Citations
Furthermore, multiple dynamical control mixer modules can be employed in our consideration.
This type of mixer needs no pair current suppression and can use local oscillator power more efficiently than a fundamental mixer.
Implementation of the mixer is relatively simple.
The mixer also achieves a high input return loss which makes it suitable for the mixer-first receivers.
This can be used as a mixer that has on/off functionality of an active mixer, based on the pH of the mixing streams, with the advantages a passive mixer offers.
Improvements in control performances will justify the additional investment of the in-line static mixer.
This technique is suitable to use with instruments that employ a mixer-based internal architecture.
Our theoretical and experimental studies carried out over Ka-band show that the new mixer has a conversion loss comparable to the conventional balanced fundamental harmonic mixer.

See what other people are reading

What is the definition of autocontrole through experimental analysis of behavior?
5 answers
What measures can be taken to improve safety when using doorknobs in rest rooms or comfort rooms?
5 answers
What measures can be taken to improve safety when using doorknobs in rest rooms or comfort rooms?
5 answers
What is mechanisms of theX-ray detection?
5 answers
The mechanisms of X-ray detection involve various components and processes. X-ray detectors typically consist of vibrating disks, conveying devices, guide rails, detection devices, and sorting mechanisms to facilitate efficient detection of materials. These detectors utilize the Shockley-Ramo theorem to operate, incorporating ionization energy for electron-hole pair creation and responsivity formulation. In medical imaging, flat panel X-ray imagers (FPXIs) play a crucial role, utilizing direct conversion technology where X-ray photons are converted to charges in a photoconductor, then read by sensors like TFT-AMA or CMOS arrays. Additionally, a guiding mechanism with lead screws and sliders enables precise adjustment for optimal X-ray source reception, ensuring clear image quality and easy maintenance. These combined mechanisms enhance detection efficiency and accuracy in X-ray applications.
What are the negative impact of 3D Printing in terms of Quality Control for Military and defense sector?
5 answers
The negative impacts of 3D printing on quality control in the military and defense sector stem from potential issues such as poor printing effects, wire drawing, nozzle blockage, and the risk of circumventing export controls. In the context of additive manufacturing, specifically fused deposition modeling (FDM), challenges include deformed geometry, clogged nozzles, and dimensional inaccuracies, often due to imprudent trial-and-error processes and troubleshooting quality control. Research emphasizes the importance of understanding printing conditions, such as print deposition angle, shell walls, and retraction speed, to enhance the quality of 3D printed parts, with factors like retraction speed and deposition angle significantly impacting final quality. These issues highlight the critical need for stringent quality control measures to prevent defects and ensure the reliability of 3D printed components in military and defense applications.
What are the negative impact of 3D Printing in terms of Quality Control for Manufacturers?
5 answers
3D printing, while offering benefits like complex structures and mass customization, poses challenges in quality control for manufacturers. Issues such as poor printing effects, wire drawing, and nozzle blockages are often linked to control system deficiencies. Base vibrations during printing can significantly degrade part quality, with base vibration impacting part roughness 600 times more than machine operation. Failures in FDM processes, such as deformed geometry and clogged nozzles, are preventable but often occur due to imprudent print processes and troubleshooting quality control. Understanding printing conditions like deposition angle and retraction speed is crucial for enhancing final part quality, with factors like humidity affecting filament bonding strength. Detecting and adjusting printing settings based on filament defects can help reduce unusable parts and improve manufacturing outcomes.
Why millimeter wave is important in next generation wireless communication?
5 answers
Millimeter-wave (mm-wave) technology is crucial in next-generation wireless communication due to its ability to meet the escalating demands of consumer wireless technologies. Operating in the 10 to 100 GHz frequency range, mm-wave systems offer increased data rates, reduced latency, and robust service for a large number of users. These systems provide high transmission rates, wide bandwidth, and immunity to interference, making them ideal for high-quality, high-speed broadband networks. Additionally, mm-wave technology addresses frequency band scarcity issues by accessing a wide spectrum up to tens of Gigahertz, enabling improved throughput with small fractional bandwidths. The integration and packaging of mm-wave modules in compact sizes at low costs while maintaining reliability is a key challenge for various applications, emphasizing the importance of mm-wave technology in diverse fields.
What are the advantages and limitations of using 8-bit microcontrollers for direct digital synthesis?
5 answers
Using 8-bit microcontrollers for direct digital synthesis (DDS) offers advantages such as increased processing power through distributed systems theory, enabling efficient task execution and data analysis. Additionally, the implementation of DDS on low-cost field programmable gate arrays (FPGA) allows for precise control over waveform parameters without glitches or phase discontinuity, along with the ability to modulate pulse characteristics and trigger pulse generation externally. However, limitations include the restricted architecture of 8-bit microcontrollers, which may pose challenges in handling complex operations and tasks efficiently. Furthermore, the slow pace of adopting precision farming technologies in agriculture, including DDS, in Russia highlights the need for increased government support to update material and technical resources and enhance domestic production of farming technologies.
How nft works in aquaponics?
5 answers
The Nutrient Film Technique (NFT) is a popular hydroponic cultivation method that can also be applied in aquaponics. In aquaponics, NFT involves designing a system that controls pH and TDS levels to optimize plant growth and resistance to pests and diseases. The NFT method in aquaponics utilizes a monitoring system based on the Internet of Things (IoT) to regulate the active time of pH Up, pH Down, and AB Mix nutrient pumps, ensuring the normalization of pH and TDS levels in the nutrient liquids. By implementing a control system using the Mamdani Fuzzy Inference System, NFT in aquaponics can effectively manage the nutrient levels for plant growth, achieving optimal conditions with minimal energy consumption and disease spread.
What materials are commonly used in x ray detectors?
5 answers
Commonly used materials in X-ray detectors include perovskite materials like halide perovskites, gallium oxide (Ga2O3), and conventional semiconductors such as Si, α-Se, PbI2, and CdZnTe. Perovskite materials offer high X-ray sensitivity, excellent carrier transport capability, and high effective atomic number, making them ideal for X-ray detection. Gallium oxide (Ga2O3) is also a promising material due to its wide bandgap, high mass attenuation coefficient, and radiation damage resistance. Additionally, conventional semiconductors like Si, α-Se, PbI2, and CdZnTe have been traditionally used in X-ray detectors, although they may have limitations such as low stopping power for X-rays and high fabrication costs. These materials play crucial roles in various X-ray detection applications in medical imaging, industrial inspection, and scientific research.
What is application or daily use of adder and subtractor?
5 answers
Adder and subtractor circuits play a crucial role in digital circuits for performing arithmetic operations like addition and subtraction. These circuits are essential components in processors, where the Arithmetic Logic Unit (ALU) utilizes them for executing mathematical functions. In the realm of quantum-dot cellular automata (QCA), novel adder/subtractor designs have been proposed, leveraging the benefits of quantum technology for efficient and cost-effective computing systems. Additionally, the Universal Verification Methodology (UVM) is employed for verifying the functionality of adder-subtractor circuits, offering automation and ease of building verification environments. Overall, adder and subtractor circuits find widespread application in daily computing tasks, ensuring accurate and reliable arithmetic calculations in various digital systems.